diff --git a/model/sync-app-data-fetch.cc b/model/sync-app-data-fetch.cc
index b3bf362..ca81c3a 100644
--- a/model/sync-app-data-fetch.cc
+++ b/model/sync-app-data-fetch.cc
@@ -38,7 +38,7 @@
   
   // sequence number logic here
   uint32_t start = 0;
-  if (oldSeq.isValid ())
+  if (oldSeq.isValid () && oldSeq.getSession() == newSeq.getSession())
     {
       start = oldSeq.getSeq () + 1;
     }